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Description
There are a lot of compiler warnings in our apple-clang builds of the type
2022-12-09T09:20:13.0853400Z ld: warning: direct access in function 'char const* fmt::v8::detail::parse_replacement_field<char, void fmt::v8::detail::vformat_to<char>(fmt::v8::detail::buffer<char>&, fmt::v8::basic_string_view<char>, fmt::v8::basic_format_args<fmt::v8::basic_format_context<std::__1::conditional<std::is_same<fmt::v8::type_identity<char>::type, char>::value, fmt::v8::appender, std::__1::back_insert_iterator<fmt::v8::detail::buffer<fmt::v8::type_identity<char>::type> > >::type, fmt::v8::type_identity<char>::type> >, fmt::v8::detail::locale_ref)::format_handler&>(char const*, char const*, void fmt::v8::detail::vformat_to<char>(fmt::v8::detail::buffer<char>&, fmt::v8::basic_string_view<char>, fmt::v8::basic_format_args<fmt::v8::basic_format_context<std::__1::conditional<std::is_same<fmt::v8::type_identity<char>::type, char>::value, fmt::v8::appender, std::__1::back_insert_iterator<fmt::v8::detail::buffer<fmt::v8::type_identity<char>::type> > >::type, fmt::v8::type_identity<char>::type> >, fmt::v8::detail::locale_ref)::format_handler&)' from file '/Users/runner/.conan/data/fmt/8.0.1/_/_/package/db14d83fb6d5b354ad734851c8c78016652c0ce0/lib/libfmt.a(format.cc.o)' to global weak symbol 'fmt::v8::appender fmt::v8::detail::write<char, fmt::v8::appender, double, 0>(fmt::v8::appender, double)::specs' from file 'CMakeFiles/test_sdmm.dir/sdmm.cc.o' means the weak symbol cannot be overridden at runtime. This was likely caused by different translation units being compiled with different visibility settings.
Based on stackoverflow and a linked thread it's to do with boost (or the c++ standard library?) being compiled with different visibilty settings to our code. They suggest adding -fvisibility=default to cxxflags on apple-clang. Does not seem to be breaking anything though.